Duncan Overglazes consist of precious metals in metallics overglaze form and, when fired, yield the brilliance of gold and white gold, and lusters for a rainbow of hues, like that of a pearl.

Duncan Overglazes

Bright Gold, White Gold, premium Gold are are real precious metals applied to fired glazed ware as the final finish. Mother-of-Pearl is a translucent overglaze with a lustrous iridescence. Essence is a must-have cleaning solution for all of your brushes and tools used with Duncan Overglazes.

Products

Metallics (Premium Gold, Bright Gold, White Gold)

Metallics are opaque, with the brilliance of 22-karat yellow gold or white gold. The appearance of each metallic overglaze is determined by the glaze the metallic is applied over (ex. when applied over a gloss glaze, the metallic will be shiny; a matte glaze, the metallic will be dull). Metallic Overglazes are normally applied over a fired glaze but can also be applied to unglazed high-fired porcelain or stoneware bisque. If applied over unglazed porcelain and stoneware the appearance is extremely matte. For ease of application, each brush-on overglaze is tinted with its own special color. Premium Gold has a red tint, Bright Gold has a brown tint, and White Gold has a green tint.

Mother of Pearl

Mother-of-Pearl is a metallic compound that is applied as a final finish over fired glazes that are compatible with overglazes.  Mother of Pearl is a translucent overglaze with a lustrous iridescence, and creates an iridescent look when properly applied and fired. Its appearance is determined by the glaze that the luster is applied over (gloss glaze, shiny luster, matte glaze, dull luster). For ease of application, each brush-on overglaze is tinted with its own special color. Mother-of-Pearl has a blue tint.

Essence

OA 901 Essence is used to thin lusters, or re-wet dried out luster on brushes or inside the bottle. Other cleaning agents may contain water or solvents, resulting in the separation of overglaze during subsequent applications. You can clean brush in Essence and let dry, but it is wasteful to throw away gold. So when done lustering, wrap the brush in foil, when you need to use it a few drops of Essence will bring the luster back.

Precious Metals

We’ve captured the timeless, iridescent beauty of precious gold and everyone’s favorite gemstone and transformed it into overglazes, ideal for making your work look like a million bucks. 

General Use

Metallic Overglaze Application

  1. Note: This product is only non-toxic after firing. Work in a well-ventilated area when applying to your piece.
  2. Do not stir or shake.
  3. Place a small amount of Gold or White Gold on a glazed palette; apply one smooth coat with a brush designated for use with each respective product.
  4. Try to attain an even application of product: Premium Gold tint should be red in color; Bright Gold tint should be flag brown in color; White Gold tint should be green in color.
  5. Do not let metallic pool in an area; brush out smoothly.
  6. Allow to dry.
  7. Stilt and fire Metallics to cone 019-018.
  8. Clean brush in Essence and let dry.

Mother-of-Pearl Overglaze Application

  1. Note: This product is only non-toxic after firing. Work in a well-ventilated area when applying to your piece.
  2. Do not stir or shake.
  3. Place a small amount of Mother of Pearl on a glazed palette:
  4. For a swirled look, swirl on one coat, overlapping strokes.
  5. For a smooth look, brush on all strokes in the same direction.
  6. Use a soft brush like a Deerfoot Stippler that has been designated for Mother-of-Pearl.
  7. Correct application should produce a light blue tint over applied area. A very dark blue means the Mother of Pearl is applied too heavily.
  8. Allow to dry.
  9. Stilt and fire to cone 020.
  10. Clean brush in Essence and let dry.

Essence Application

  1. Swish overglaze brush in solvent until bristles are free of product.
  2. Wipe brush on paper towel.
  3. Use a separate bottle of Essence for each overglaze product.

Certified Non-Toxic Dinnerware Safe

Duncan Overglazes are non-toxic after firing. Work in a well-ventilated area when applying to your piece. Duncan Overgalzes are dinnerware safe but ware decorated with metallic overglazes should not be used in microwave ovens.

Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away.

Available Sizes

Helpful Hints

  • If overglazes are accidentally applied in the wrong area, dip a cotton swab in Essence and neatly wipe off misplaced color.
  • If any areas are missed, go back and touch up before either the metallic or the luster overglaze dries.
  • For solid coverage with Bright Gold and Premium Gold, apply over a yellow glaze or a yellow underglaze covered by clear glaze for best results; for solid coverage with White Gold, apply over a gray glaze or a gray underglaze covered by a clear glaze.
  • Overglazes dry in about one hour, but overglazed ware can be fired while still wet. The kiln must be clean, well ventilated (do not overload) and follow a normal firing schedule. Do not touch wet decoration and handle as little as possible until ware is fired to avoid smudging.
  • Caution  Overglazes contain solvents and should be used in a well-ventilated area. Those susceptible to odors (such as pregnant women) should be especially careful to work only in areas with an adequate ventilation system. During firing, odors are not dangerous but can be offensive. These odors quickly leave the area; however, you should not work in the kiln area during firing.
  • When using metallic and lusters on the same piece, it is best to apply the metallic first, fire to cone 019-018, and then apply the luster and refire to cone 020.
  • Dinnerware Safety – Duncan Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away.
  • Duncan Overglaze Accessory: OA 901 Essence is the necessary cleaner for brushes used with Duncan Overglazes. Any other cleaning agent may contain water or solvents which will cause separation of the overglaze during subsequent applications.
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